Trimming attachment for sewing-machines.



No. 735,572. C PATENTED AUG. 4, 1908. A. J. A. OESTERREICH. TRIMMINGATTACHMENT FCR SEWING MACHINES.

APPLICATION FILED OCT. 6. 1902.

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UNITED STATESi Patented August 4, 1993. K y

PATENT OFFICE.

' AMANDUS JOHANN AUGUST OESTERREICH, OE HAMBURG, GERMANY,

ASSIGNOR TO THE SINGER MANUFACTURING COMPANY, A CORPO- RATION OE NEWJERSEY.

TRIIVINIINGI ATTACHMENT FOR SEWINGIVIACHINES.

:'BECIFICATIQN forming part of Letters Patent No. 735,572, dated August4, 1903.

Application filed October 6, 1902. VSerial No. 126,160. (No model.)

To 1f/Zi wiz/0m, it may concern,.-

Be it known that I, AMANDUS J OHANN AU- GUST OESTERREICH, a citizen ofthe German Empire, residing at Hamburg, G ermany, have invented certainnew and useful Improvements in Trimming Attachments for Sewing-Machines, of which the following is a specification, reference being hadtherein to the accompanying drawings.

This invention relates to a trimming attachment for sewing-machines,adapted to cut out patterns or figures on one ply of material whilebeing stitched to another ply in forming what is known as appliqu-work,7now lar view with the vupper shear-blade depressed.'

Fig. 3 is a plan view of the attachment, vpartly in horizontal section,illustrative of its operation. Fig. 4 is a rear end view of the device;and Fig. 5, a rear view, partly in section, on line 5 5, Fig. 2.

Referring to the drawings,a denotes a block or bracket rigidly attachedto the presser-bar c by a set-screw b, said block or bracket having apresser-foot portion d".

The improved trimming attachment, as herein illustrated, comprises anupper reciprocating shear-blade f and a lower relatively stationaryshear-blade g', lthe latter vbeing in the form of a slenderiingeradapted toenter between the upper ply of material n and the lowerply of the material m closely adjacent to the vertical path of theneedle p, as shown in the drawings. The said lower shear-blade g isformed at the forward end of a plate g, pivotally mounted on the blockor bracket ct by means of the screwl, which serves as an axis-pin forthe operating-leverh,v forked to embrace a pin or roller-stud e' in theneedlebar k. The upper shear-blade is formed as a part of a plate f,pivoted by the screw e rearward of the pivot Z to the plate g, and isprovided forward of its pivotal point with a rectangular opening` s, inwhich works a cam h', movingwith the operating-lever h to impartvertical movements to the upper shear-blade.

Attached to the lower part 4of the block or bracket d is a spring d,which presses on the inner projecting stud end of the pivot-screw e, soas to press the lower blade g yieldingly downward on the lower ply ofmaterial m, while permitting said blade to adjust itself to varyingthicknesses of material or thick places in the work, as in passing overcrossseams, said screw e serving as the fulcrum of .the plate f as thelatter is operated by the lever h in actuating the upper blade f.

' Owing to the fact that the acting cutting portion of the upperreciprocating blade f is relatively short and is closely adjacent to theneedle the trimming attachmentis well adapted to follow short curves inmaking fornamental patterns in the production of appliquelwork, whilethe yieldingly mounted lower vblade readily adapts itself to differentthickthe two shear-blades remain the same notwithstanding anychange ofposition of the lower blade. This" feature is of some importancein atrimming device in which the movable -blade is operated from theneedlebar andhas therefore an unvarying throw, as it causes the upperreciprocating blade to be lifted somewhat higher at the upward limit ofits stroke when the lower plyof inaterial or the work beneath the lowerblade is thick than when it is thin. In other words,

the construction under consideration permits of a variation of theworking position of the reciprocating upper blade without varying theworking throw thereof, thus well adapting the attachment for use indifferent thicknesses of work.

Having thus described my invention, I claim and desire to secure byLetters Patent of the United Statesl. A sewing-machine trimmingattachment comprising a yieldingly-monnted, normally stationary,lowerblade consisting of a slender linger adapted to enter between upperand lower plies of material, a reciprocating upper blade having a shortcutting edge, so as to trim the goods in sharp curves, said upper bladebeing pivotally connected with said lower blade, so as to be adjustabletherewith as said lower blade ada-pts itself to varying thicknesses ofwork, a pivot on which the plates carrying said blades can turn togetheras the said blades are adjusted, and means for operating the said upperblade from the needle-bar of a sewing-machine.

2. In a sewing-machine trimming attachment, the combination with a blockor bracket adapted for attachment to a sewing-machine, of two platespivotally mounted at a common point on said block or bracket and eachprovided at its forward part with a cutting-blade, said plates beingpivotally connected together at a point rearward of their pivotalconnection with said block or bracket, a spring which yieldingly pressesthe lower blade downward on the lower ply of material, and means forreciprocating the upper blade from the needlebar of a sewing-machine.

In a sewingmachine trimming attachment, the combination with the blockor bracket a, of the plate g provided at its forward end with the lowerblade g/ and pivotally mounted on the said block or bracket, the plate fprovided at its forward part with the upper blade f and also pivotallymounted on said block or bracket at a point coincident with the pivot-alpoint of the said plate g, said plate f being also pivoted to the saidplate g, as at e,a spring yieldingly pressing said blades downward'toward the work, and means for operating said upper blade from theneedlebar of a sewing-machine.

4. In a sewing-machine trimming attachment, the combination with theblock or bracket d, of the plaies f and f/ provided, respectively, withthe upper and lower blades fl and g', said blade y consisting ofaslender finger adapted to enter between two plies of material and saidblade f having a short eutting edge to permit trimming in sharp curves,the pivot l at which said plates are mounted on said block or bracket,the pivot e connecting said plates together and serving as a fulcrum forthe reciprocating upper blade, the spring (Z, and the lever 7L adaptedto be operated from the needle-bar of a sewing-machine and provided withmeans for actuating said upper blade. 5. In a sewing-machine trimmingattachment, the combination with a block or bracket adapted forattachment to a sewing-machine and provided with apivotal pin, of twoplates mounted upon said pivotal pin and each provided at its forwardpart with a cutting-blade, said plates being pivotally connectedtogether at a point rearward of the pivotal pin upon which they aremounted, a spring operating to yieldingly press the said blades towardthe lower ply of material, and a forked operatinglever mount-ed uponsaid pivotal pin and provided with a cam entering a suitable opening inone of said levers and having its forked end portion adapted to embracea stud upon the needle-bar of the sewing-machine.

In testimony whereof I atlix my signature in presence of two witnesses.

AMANDUS JOHANN AUGUST OESTERREICH. lVitn'esses:

E. II. L. MUMMENHOFF,

OTTO W. HELLMRICH.

